a)\(\dfrac{-5}{8}-2.\dfrac{25}{10}+\dfrac{1}{2}\)
b)\(4\dfrac{5}{9}:\left(\dfrac{-5}{7}\right)+5\dfrac{4}{9}:\left(\dfrac{-5}{7}\right)\)

\(\left(3x+1\right)^2=25\)

\(\left(3x+1\right)^2=25\)

\(\left(\dfrac{1}{2}\right)^3+\dfrac{1}{5}.\sqrt{100}-2\)

Câu 3:Người ta chia đất ra làm nhiều loại nhằm:

a.     Xác định độ pH của từng loại đất.

b.     Cải tạo đất và có kế hoạch sử dụng đất hợp lí.

c.      Xác định tỉ lệ đạm trong đất.

d.     Cả 3 câu a, b, c.

Câu 4: Muốn cây đạt năng suất cao phải đạt những yêu cầu nào sau đây:

a.     Giống tốt.

b.     Độ phì nhiêu.

c.      Thời tiết thuận lợi, chăm sóc tốt.

d.     Cả 3 câu a,b,c.

Câu 5: Đất giữ được nước và chất dinh dưỡng là nhờ:

a.     Hạt cát, sét.

b.     Hạt cát, limon.

c.      Hạt cát, sét, limon.

d.     Hạt cát, sét, limon và chất mùn.

Câu 6. Vai trò của phần rắn đất trồng đối với cây trồng là:

A. Cung cấp chất dinh dưỡng cho cây.

B. Cung cấp chất khoáng cho cây.

C. Cung cấp oxy cho cây.

D. Cung cấp chất hữu cơ cho cây.

Câu 7. Loại đất nào sau đây giữ nước và chất dinh dưỡng kém nhất?

A. Đất thịt.                                     B. Đất cát.     

C. Đất cát pha.                              D. Đất sét.

Câu 8. Để cải tạo đất chua người ta dùng:

A. Phân chuồng.                            B. Phân đạm.

C. Vôi.                                           D. Phân lân.

Câu 9. Thành phần đất trồng gồm:

A. Phần khí, phần lỏng, chất vô cơ. 

B. Phần khí, phần lỏng, chất hữu cơ.

C. Phần khí, phần rắn, phần lỏng.

D. Phần rắn, chất hữu cơ, chất vô cơ.

Câu 10. Trong các cách sắp xếp về khả năng giữ nước và chất dinh dưỡng của các loại đất từ tốt đến kém sau, cách sắp xếp nào là đúng?

A. Đấtsét, đất thịt, đất cát.            B. Đất cát, đất thịt, đất sét.        

C. Đất thịt, đất sét, đất cát.                D. Đất sét, đất cát, đất thịt.

Câu 11: Vai trò của trồng trọt là:

A. Cung cấp lương thực, thực phẩm cho con người; cung cấp thức ăn cho vật nuôi

B. Cung cấp nguyên liệu cho công nghiệp

C. Cung cấp nông sản cho sản xuất

D. Tất cả các ý trên

Câu 12: Khai hoang, lấn biển nhằm mục đích gì?

A. Tăng sản lượng nông sản

B. Tăng vụ trên đơn vị diện tích đất trồng

C. Tăng chất lượng nông sản

D. Tăng diện tích đất trồng

Câu 13: Nhiệm vụ không phải là nhiệm vụ của ngành trồng trọt là:

A. Trồng cây lúa lấy gạo để xuất khẩu

B. Trồng cây rau, đậu, vừng làm thức ăn cho con người

C. Trồng cây mía cung cấp cho nhà máy chế biến đường

D. Trồng cây tràm để lấy gỗ làm nhà

Câu 14: Đất trồng là môi trường?

A. Cung cấp chất dinh dưỡng, ôxy

B. Giúp cây đứng vững

C. Cung cấp chất dinh dưỡng, ôxy, nước

D. Câu B và C

Câu 15: Đất trồng là lớp bề mặt ……….. của vỏ Trái Đất.

A. Tơi xốp

B. Cứng, rắn

C. Ẩm ướt

D. Bạc màu

V. Write compound adjectives:

Ex: A break last twenty minutes.               -> A twenty-minute break

1. A summer vacation lasts three months  -> 

2. A tour last six days                                   -> 

3. A rest lasts ten minutes.                           -> 

4. A stamp costs five hundred dong           -> 

5. A class lasts two periods.                        -> 

6. A meeting lasts two hours.                      -> 

7. A trip lasts ten days.                                 -> 

8. A road is fifty miles long.           -> 

20. These students are very keen ______ playing sports.

            A. to                           B. of                           C. on                          D. with

21. Students have to ______ their work before tests.

            A. do                          B. practice                 C. review                   D. learn

22. The mechanic repairs ______in the factory.

            A. things                    B. machines              C. furniture               D. tools

23. I prefer films ______plays.

            A. with                       B. than                       C. to                           D. as

24. He prefers ______TV to reading books.

            A. watch                    B. watching               C. to watching          D. to watch

25. Their family often go to the seaside ______vacation.

            A. in                           B. at                            C. on                          D. for

26. Farmers have fewer ______off than workers.

            A. day                        B. days                       C. date                       D. time

27. Vietnamese students often have ______summer vacation.

            A. three months        B. three-month         C. three – months     D. three month

28. The buffalo live in the ______.

            A. cage                       B. shed                       C. coop                      D. room

29. The hen and cocks live in the ______.

            A. cage                       B. shed                       C. coop                      D. room

30. farmers have no ______vacations.

            A. really                     B. real                        C. reality                   D. disreal

31. When there is ______work, her father often goes to the city.

            A. few                        B. fewest                    C. less                        D. more

32. In the future, ______will do all the work for people.

            A. animals                 B. machines              C. things                    D. they

33. I am very ______ to see you here.

            A. please                    B. pleased                  C. pleasure                D. pleasing

34. We will have a day ______ this week.

            A. on                          B. off                          C. of                           D. at

35. Linh delivers milk ______ houses in the street everyday.

            A. to                           B. with                       C. for                          D. at

20. These students are very keen ______ playing sports.

            A. to                           B. of                           C. on                          D. with

21. Students have to ______ their work before tests.

            A. do                          B. practice                 C. review                   D. learn

22. The mechanic repairs ______in the factory.

            A. things                    B. machines              C. furniture               D. tools

23. I prefer films ______plays.

            A. with                       B. than                       C. to                           D. as

24. He prefers ______TV to reading books.

            A. watch                    B. watching               C. to watching          D. to watch

25. Their family often go to the seaside ______vacation.

            A. in                           B. at                            C. on                          D. for

26. Farmers have fewer ______off than workers.

            A. day                        B. days                       C. date                       D. time

27. Vietnamese students often have ______summer vacation.

            A. three months        B. three-month         C. three – months     D. three month

28. The buffalo live in the ______.

            A. cage                       B. shed                       C. coop                      D. room

29. The hen and cocks live in the ______.

            A. cage                       B. shed                       C. coop                      D. room

30. farmers have no ______vacations.

            A. really                     B. real                        C. reality                   D. disreal

31. When there is ______work, her father often goes to the city.

            A. few                        B. fewest                    C. less                        D. more

32. In the future, ______will do all the work for people.

            A. animals                 B. machines              C. things                    D. they

33. I am very ______ to see you here.

            A. please                    B. pleased                  C. pleasure                D. pleasing

34. We will have a day ______ this week.

            A. on                          B. off                          C. of                           D. at

35. Linh delivers milk ______ houses in the street everyday.

            A. to                           B. with                       C. for                          D. at

36. Sorry, I can’t go with you. I have ______ my work for the test tomorrow.

            A. review                   B. to review               C. reviewing             D. to reviewing

37. I usually go to bed at half ______eleven.

            A. past                        B. to                            C. of                           D. at

38. I hope the ______can repair our car quickly.

            A. mechanic              B. reporter                 C. nurse                     D. journalist

39. My ______always comes early so I get my letters before I go to work.

            A. chemist                 B. porter                    C. mailman                D. engineer

40. My tooth doesn’t stop hurting. I will go and see my ______.

            A. actor                      B. dentist                   C. doctor                   D. baker

20. These students are very keen ______ playing sports.

            A. to                           B. of                           C. on                          D. with

21. Students have to ______ their work before tests.

            A. do                          B. practice                 C. review                   D. learn

22. The mechanic repairs ______in the factory.

            A. things                    B. machines              C. furniture               D. tools

23. I prefer films ______plays.

            A. with                       B. than                       C. to                           D. as

24. He prefers ______TV to reading books.

            A. watch                    B. watching               C. to watching          D. to watch

25. Their family often go to the seaside ______vacation.

            A. in                           B. at                            C. on                          D. for

26. Farmers have fewer ______off than workers.

            A. day                        B. days                       C. date                       D. time

27. Vietnamese students often have ______summer vacation.

            A. three months        B. three-month         C. three – months     D. three month

28. The buffalo live in the ______.

            A. cage                       B. shed                       C. coop                      D. room

29. The hen and cocks live in the ______.

            A. cage                       B. shed                       C. coop                      D. room

30. farmers have no ______vacations.

            A. really                     B. real                        C. reality                   D. disreal

31. When there is ______work, her father often goes to the city.

            A. few                        B. fewest                    C. less                        D. more

32. In the future, ______will do all the work for people.

            A. animals                 B. machines              C. things                    D. they

33. I am very ______ to see you here.

            A. please                    B. pleased                  C. pleasure                D. pleasing

34. We will have a day ______ this week.

            A. on                          B. off                          C. of                           D. at

35. Linh delivers milk ______ houses in the street everyday.

            A. to                           B. with                       C. for                          D. at

36. Sorry, I can’t go with you. I have ______ my work for the test tomorrow.

            A. review                   B. to review               C. reviewing             D. to reviewing

37. I usually go to bed at half ______eleven.

            A. past                        B. to                            C. of                           D. at

38. I hope the ______can repair our car quickly.

            A. mechanic              B. reporter                 C. nurse                     D. journalist

39. My ______always comes early so I get my letters before I go to work.

            A. chemist                 B. porter                    C. mailman                D. engineer

40. My tooth doesn’t stop hurting. I will go and see my ______.

            A. actor                      B. dentist                   C. doctor                   D. baker

2. Tim doesn’t have a Tet holiday, but Ba _______

            A. is                            B. does                       C. do                           D. are

3. King Hung’s Day is a ______ day in Vietnam.

            A. common                B. weekend               C. public                    D. private

4. In the afternoon, the chickens produce______eggs than in the morning.

            A. few                        B. fewer                     C. little                       D. less

5. When we have more cows, we’ll have much ______ milk.

            A. more                      B. much                     C. many                     D. lots of

6. Lan ______a vacation in summer.

            A. are always having                                   B. always has            C. is always having D. always have

7. They often work ______than us.

            A. harder                    B. hard                       C. more hard             D. hardest

8. The farmers grow ______ of vegetables.

            A. many different type                                B. many different types

            C. much different type                                D. much different types

9. How many hours a day does Mr. John usually work, Lucy?

A. She usually works 8 hours a day.                      B. He usually works 8 hours a day.

C. Mr. John and Lucy usually works 8 hours a day.         D. Lucy usually works 8 hours a day.

10. How do you know Mai like living in the countryside?

            A. She often tells me she likes living there.

            B. She oten visits her aunt in the countryside.

            C. Yes, she often tells me she likes living there.

            D. She often talks to me about her aunt in the countryside.

11. You will be late ______school.

            A. at                            B. for                          C. in                           D. with

12. Their summer vacation starts ______June.

            A. on                          B. in                            C. at                            D. of

13. Hoa will see her parents ______their farm.

            A. on                          B. at                            C. in                           D. for

14. Hoa will see her friends ______at the airport.

            A. on                          B. in                            C. at                            D. off

15 Hoa likes to help her parents ______ the farm work.

            A. for                          B. with                       C. of                           D. to

16. Farmers have to work ______ all day and night long.

            A. hard                       B. hardly                    C. harder                   D. hardest

17. Hoa’s friend is very interested ______writing letters.

            A. to                           B. of                           C. in                           D. at

18. The ______ vacation is in summer.

            A. long                       B. longer                    C. longest                  D. most long

19. Vietnamese students have ______ vacation than American ones.

            A. few                        B. fewer                     C. little                       D. less

20. These students are very keen ______ playing sports.